The Crown's creator Peter Morgan believes that the Queen is a "countryside woman with limited intelligence."
The British film writer and playwright also suggested that the monarch would have preferred to have spent her life looking after corgis and breeding horses rather than dealing with matters of the state.
Morgan added that, as a staunch republican, he has shocked himself by creating a series about the British royal family, but approaching the subject as an "outsider" has perhaps given him an advantage over a typical "fawning" royal biographer.
"Maybe it's because I am an outsider — both my parents were refugees," he told .
"If you had told me I would be doing this, I would have told you it was mad, hallucinogenic conjecture.
"I wouldn't have guessed there would be anything more to say about this countryside woman of limited intelligence who would have much preferred looking after her dogs and breeding horses to being queen.
"But now I'm here. Life is strange."
Morgan, whose credits also include Oscar-winning film The Queen and play The Audience, both starring Dame Helen Mirren as the Queen, compared the monarchy to "a mutating virus."
Saying how the royals had managed to survive the 20th century without "catastrophic errors" by the Queen, Morgan continued: "They're survival organisms, like a mutating virus.
"Look at how many prime ministers are wheeled out in coffins, on stretchers, having made fools of themselves: Downing Street is full of sick people. And yet she survives.
"It is clearly a deranged institution and a completely insane system, but perhaps it's the insanity that makes it work.
The critically-acclaimed series has won a Golden Globe for Best Series, and acting awards for Claire Foy, who plays the Queen, and John Lithgow, who stars as Winston Churchill.
Morgan added that his version of royal history was a more imaginative take on the monarchy as he doesn't write it from the view of a royal biographer.
"Authorized royal biographers are so straitjacketed, deferential, fawning and unadventurous that they can only be after a knighthood," he commented. "Or they're completely scurrilous and insolent, like Andrew Morton or Paul Burrell.
"I think there's room to creatively imagine, based on the information we have about her."
The team are not in contact with the royal family over the storylines of the series, and the cast have previously admitted that they have no idea what the monarch makes of the show.
The second series is said to follow a fictional affair between Prince Philip, played by Matt Smith, and a ballet dancer.
Meanwhile, it was recently confirmed that in the third series of the drama.